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10 条记录 (耗时 0.06 秒)

    Loading probe for use in testing transducers
    9.
    发明授权
    Loading probe for use in testing transducers 失效
    加载用于测试传感器的探头

    公开(公告)号：US5327771A

    公开(公告)日：1994-07-12

    申请号：US904396

    申请日：1992-06-25

    申请人： Robert Gentles

    发明人： Robert Gentles

    IPC分类号： G01H3/00 ,  H01L41/22

    CPC分类号： G01H3/005

    摘要： A loading probe for use in testing transducers includes an elongated body capable of simulating the normal acoustic impedance presented to a transducer to be tested by the medium in which the transducer is to operate. The main body of the loading probe has a tube made from a rigid material, and a rod having an elongated convergent portion extending into the interior of the tube so as to define a cavity which has a varying cross section. The cavity houses a core of material having a close match of acoustic impedance with the material of the tube and rod but a higher acoustic loss factor. The cavity is sealed. The active end of the loading probe carries a piezoelectric element having a planar form, and a protective end cap is bonded to the active end of the loading probe to enclose the piezoelectric element.

    摘要翻译： 用于测试换能器的加载探针包括细长体，其能够模拟通过传感器要操作的介质测试的换能器所呈现的正常声阻抗。 装载探针的主体具有由刚性材料制成的管，以及具有延伸到管内部的细长会聚部分的杆，以限定具有变化横截面的腔。 空腔容纳材料芯，其声阻抗与管和杆的材料紧密匹配，但是具有较高的声学损耗因子。 空腔密封。 负载探针的活动端承载具有平面形式的压电元件，并且保护端盖接合到负载探针的有效端以封闭压电元件。

    Piezo-electric transducer test apparatus
    10.
    发明授权
    Piezo-electric transducer test apparatus 失效
    压电换能器测试仪

    公开(公告)号：US4959992A

    公开(公告)日：1990-10-02

    申请号：US338952

    申请日：1989-04-17

    申请人： Robert Gentles

    发明人： Robert Gentles

    IPC分类号： G01H3/00

    CPC分类号： G01H3/005

    摘要： An acoustic loading rod for use in testing transducers which are intended for use in a liquid medium. The rod comprises an elongated body (10) capable of simulating the normal acoustic impedance presented to a transducer to be tested by the medium in which the transducer is to operate, the rod (10) having a bore (30) in its main body portion containing a core of material having a close match of acoustic impedance with the material of the rod but a higher acoustic loss factor. Active piezo-electric transducer (22) is mounted between the ends of the rod.